CX31
18
OPTICAL CHARACTERISTICS
(Oil immersion)
10X eyepieces (See Note)
175 .0
28.0
3.04
0.69
18.5
10.6
0.6
0.13
–
–
0.17
–
3.36
1.34
0.52
0.27
40X
100X
400X
1000X
5.0(4.5 )
2.0(1.8 )
0.5(0.45)
0.2(0.18)
Plan CN
Plan Achromat
(FN 22)
4X
10X
40X
100X
0.10
0.25
0.65
1.25
Depth of
Focus
(µm)
W.D.
(mm)
Cover
Glass
Thickness
Resolution
(µm)
Total Mag.
Field
of
View
Remark
Magnification
N.A.
Characteristics
The following table shows the optical characteristics
of combinations of eyepieces and objectives. The
figure on the right shows the performance data
engraved on the objectives.
Magnification
Mechanical
tube length
Color band
Objective designation
Numerical aperture
Cover glass thickness
*Included only in the standard set of the CX31RBSFA combination.
(Note) Field number of 10X eyepieces
· With the binocular tube, the FN is 20 and the actual field of view is the figure before ( ).
· With the tilting binocular tube, the FN is 18 and the actual field of view is the figure inside ( ).
Objective
O*
Glossary
Working distance (W.D.):
Numerical aperture (N.A.):
Resolving power:
Focal depth:
Field number:
Field of view diameter:
Total magnification:
The distance from the cover glass surface to the nearest point of the objective.
The N.A. value represents a performance number which can be compared to the relative
aperture (f-number) of a camera lens. The higher N.A., the higher the resolving power.
The ability to differentiate two points, i.e., the minimum distance by which the objects must be
separated in order to be revealed as two separate objects.
The depth in the image through which the focused image will appear uniformly sharp. As the
aperture iris diaphragm is stopped down, the focal depth becomes greater. The greater the N.A. of an
objective, the shorter the focal depth.
A number that represents the diameter in mm of the image of the field diaphragm that is formed by
the lens in front of it.
The actual size of the field of view in millimeters.
Equals the objective magnification multiplied by the eyepiece magnification.
To Next Page
Loading...
